Delphi TVS R&D Engineer Interview Questions and Answers

Q1. About project recently work.
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Q2. What are the challenges with this project
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First round is aptitude test all type of questions asked like verbal, reasoning and Technical

Q1. Explain stress, strain curve diagram with example?
Ans. 
Stress-strain curve shows relationship between stress and strain in a material under tension.
• Stress-strain curve is a graphical representation of how a material deforms under stress.

• It typically consists of a linear elastic region, a yield point, plastic deformation, and ultimate failure.

• Example: Steel has a high yield strength, so its stress-strain curve shows a steep initial slope.

• Example: Rubber has a low yield stre...read more
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Q2. What is DOF? How many degrees of freedom from any object
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DOF stands for Degrees of Freedom. It refers to the number of independent parameters that define the configuration of an object.
• DOF is the number of ways a rigid body can move in 3D space.

• For a rigid body in 3D space, there are 6 degrees of freedom - 3 translational and 3 rotational.

• Examples of DOF include linear motion along x, y, z axes and rotational motion around x, y, z axes.
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Q1. EPLAN P8 Macro creation?
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Q2. EPLAN version and forms generation?
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EPLAN is a software used for electrical design engineering. It allows for easy generation of forms.
• EPLAN is a popular software used for electrical design engineering

• It allows for easy generation of forms such as bills of materials, wiring diagrams, and terminal diagrams

• EPLAN also has a version control system to manage changes and revisions

• The latest version of EPLAN is EPLAN Electric P8

• EPLAN also offers integration wit...read more
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Q1. What is semaphore,mutex, all about rtos questions and implementations? what is little endian, write a program to know system is of which endian? what is static,volatile, how did you used in your program? ...read more
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Q2. Questions on rtos projects
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Q3. Structure and struct pointers
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Q4. Arrays and pointers usage with arrays
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Arrays are used to store multiple values of the same data type. Pointers are used to store memory addresses of variables.
• Arrays are accessed using index notation, e.g. array[0]

• Pointers can be used to access array elements, e.g. *(array+0)

• Arrays can decay into pointers when passed to functions

• Pointers can be used to dynamically allocate memory for arrays
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Q5. Function pointers and call backs
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Q6. C fundamentals, bit manipulation
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Q1. About project experience
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Q2. Clear view on your work experience
Ans. 
I have extensive work experience in research engineering.
• Worked as a research engineer for 5 years at XYZ Company

• Led a team of engineers in developing innovative solutions for complex problems

• Published several research papers in reputable journals

• Collaborated with cross-functional teams to design and implement cutting-edge technologies

• Utilized advanced analytical tools and techniques to analyze data and draw meaningful
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Q3. Roles and responsibilities
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Q1. What is your Salary expection?
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Q1. Can you do your junior level job without guidance of seniors?
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Q1. CAD test in catia
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CAD test in CATIA evaluates candidate's proficiency in using CATIA software for designing engineering projects.
• Demonstrate ability to create 3D models using CATIA software

• Show proficiency in creating assemblies and performing simulations in CATIA

• Explain experience in generating 2D drawings and technical documentation in CATIA
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Q2. Plastic material, defects
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Q1. Tell me about yourself Favourite engineering subject
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Q1. Self Introduction
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Q2. Salary Expectation
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Q3. Why are reason you previous company?
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Q1. All questions related to plastic 1. what is plastic rib thickness basis on wall thickness?
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Q2. 2. what is shutt off angle in molding?
Ans. 
Shut off angle in molding refers to the angle at which the mold halves meet and close to form a complete part.
• Shut off angle is crucial for ensuring proper part ejection and preventing flash formation.

• It is typically between 0.5 to 3 degrees, depending on the material and part design.

• A larger shut off angle may be required for parts with deep cavities or complex geometries.

• Improper shut off angle can lead to part defec
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Q3. 3. Plastic shrinkage
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Q4. 4. In pp plastic material coating or painting are used?
Ans. 
In pp plastic material, coating is preferred over painting for better adhesion and durability.
• Coating is commonly used on PP plastic material for better adhesion and durability

• Painting is less preferred on PP plastic due to poor adhesion and durability

• Examples of coatings for PP plastic include polypropylene-specific primers and adhesion promoters
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Q5. 5. How to define undercut angle in plastic?
Ans. 
Undercut angle in plastic is the angle between the side wall of a mold and the vertical direction.
• Undercut angle is important in plastic injection molding to ensure proper release of the part from the mold.

• It is typically measured in degrees and affects the draft angle required for the mold.

• A larger undercut angle allows for easier part ejection but may require more complex mold design.

• Examples of parts with undercut a...read more
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Q6. 6. what is warpage & sink marks in plastic & how to prevent?
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Warpage and sink marks are common defects in plastic parts caused by uneven cooling. Prevention methods include proper gate design, cooling system optimization, and material selection.
• Warpage is the deformation of a plastic part due to uneven cooling, leading to dimensional inaccuracies.

• Sink marks are depressions on the surface of a plastic part caused by uneven cooling and shrinkage.

• Prevention methods include proper g...read more
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